Are you paying Y or J? If you have elite/se, you may want to consider going YYZ-DUB-CPH-AAR. That way on YYZ/DUB, you can sit in the SFKAJ (section formerly known as J) for an economy price. The other two legs are only ~2hrs so no biggie to sit in Y. [AC894/SK538/SK1257]
If you do want to pay J and want to avoid FRA, you can always go via LHR - SK & AC share a lounge there which is quite nice. Though, given my druthers, I'd much rather connect via FRA. [AC858/SK504/SK1267]